The invention relates to a phase contrast x-ray device (1) and a method for creating a phase contrast image of at least one object (4), with at least one x-ray source (2) for generating x-ray radiation that is at a certain optical distance (6) from the x-ray source has certain spatial coherence (14), and at least one evaluation device (16) for converting the x-ray radiation after radiography of the x-ray radiation through the object arranged at an optical distance from the x-ray source into the phase contrast image of the object. The phase-contrast x-ray device is characterized in that the x-ray source has a power selected from the range from 50 W up to and including 10 kW and a spatial coherence length of the x-ray radiation at the optical distance from the range of 0.05 μm. This is achieved with the aid of an x-ray source with a line-shaped focus (7) and / or by monochromatizing the x-ray radiation with the aid of a gradient multilayer reflector (20). With monochromatization, the X-rays have a temporal coherence that is suitable for taking a phase contrast image of a thicker object (15). The X-ray machine is suitable for use in medical technology and non-destructive material testing.
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